Ahmed M. Rahman Many people today have flown in an airplane. It is a common communication network today. To travel long distance airplane is must. Many ask the simple question “what makes an airplane fly”? The answer one frequently gets is[...]
Archive for the ‘Do You Know’ Category
December 4th, 2011 - 4:40 am § in Do You Know
How Air Conditioners Work
Ahmed M. Rahman An Air conditioner is a common electronic device. It used offices and home in everywhere, especially in the tropical region. An air conditioner (often referred to as AC) is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area. The cooling is don[...]
May 1st, 2011 - 12:01 am § in Do You Know
How to make paper?
Ahmed Matiur Rahman Paper is a thin material mainly used for writing option, printing upon or for packaging. It is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses and drying them into flexible sheets. Paper is a versatile material with many use[...]
March 1st, 2011 - 12:01 am § in Do You Know
What is Heredity?
Ahmed Matiur Rahman Every new organism, whether it is a planet, fish, animal or human, resembles its parents – and yet it differs from them. For example, children may look like one parent or the other, but usually they have some features of each parent.[...]
February 1st, 2011 - 12:01 am § in Do You Know
What are Birthstones?
Ahmed Matiur Rahman Many early civilizations believed that precious possessions, including gems, had strange and mysterious powers and that certain gems could even prevent or cure diseases.[...]
January 3rd, 2011 - 8:41 pm § in Do You Know
What is the art of Ceramics?
Ahmed Matiur Rahman In a museum you can see vase, jars, cups, and dishes – all pieces of pottery. Pottery is clay that has been shaped when soft, then hardened by heat. The art of making such products is called ceramics.[...]
November 1st, 2010 - 12:01 am § in Do You Know
Where do Emeralds come from?
Ahmed Matiur Rahman In ancient times, the various gems were distinguished only by their colors. The name ruby was given to all precious stones of a red hue. All green stones were called emeralds. All those of blue were called sapphires.[...]
September 1st, 2010 - 12:01 am § in Do You Know
How are Seashells formed?
Ahmed Matiur Rahman If youve ever walked along a beach, youve probably seen sea-shells lying on the sand where it has been washed in by the waves. The shell will nearly always be empty, for it is the home of some sea animal that had died.[...]
June 1st, 2010 - 12:00 am § in Do You Know
When did people first freeze food?
Ahmed Matiur Rahman We think of frozen food as a new invention, but it is actually one of the oldest methods known for preserving food. From the days when man first inhabited cold regions, he froze fish, game and other meats for future use.[...]
May 1st, 2010 - 12:00 am § in Do You Know
When Did women begin to style their hair?
Ahmed Matiur Rahman Considering what we know about women, it probably won’t surprise you to learn that women have dressed and decorated their hair from as far back as we have any records in history![...]